Differential bearing numbers/sizes

[ppeters914]

Anyone have the actual differential bearing numbers/sizes? Not referring to the Part Numbers, which are readily available:

differential.PNG

#39: 40210-85000: BEARING-SIDE
#50: 38120-61000: BEARING-DRIVE PINION, REAR
#78: 38140-61000: BEARING-DRIVE PINION, FRONT

[mraitch]

Perhaps, not the clearest question??

[ted heaton]

Perhaps, not the clearest question??

Clear enough Mr Peter H.
Mr Pete P. is looking for the inner/outer/depth measurements for the bearings.
Ted

[ppeters914]

Bearings have sizes, which are on the race and bearing along with manufacturer and country of origin. For example:

Inner wheel bearing: 30206
Outer wheel bearing: 30204

Normally, it's easy. Just disassemble, clean, and read. However, I don't want to disassemble the differential before taking it to have it rebuilt.

Tried to take pictures, but the numbers wash out. Here's an image from the internet:

bearing.png

In this case, the bearing number/size is L44643.

That help?

[mraitch]

I just wondered why, since surely the part numbers point to a correct substutute if not OEM!

[mraitch]

from timlen

https://www.applied.com/c-brands/c-timk ... gILh_D_BwE

[ppeters914]

from timlen

https://www.applied.com/c-brands/c-timk ... gILh_D_BwE

The L44643 is just some trailer wheel bearing pic I found on the internet so I could show you what I'm looking for. Not for Datsun.

I just wondered why, since surely the part numbers point to a correct substutute if not OEM!

The Nissan part numbers do not point to a substitute, and you better be sitting down before you look at the Nissan price.

Googling the part numbers only finds those part numbers. The only ones at a reasonable cost were the side bearings (eBay seller). The pinion bearings are still pricey.

That's why I wanted the bearing number.....so I can check for substitutes like I did with the wheel bearings. Sometimes it's nice and quick to go to local bearing supplier. Surprised no one has asked before.

[fj20spl311]

Both pinion bearings cross in RockAuto

[mraitch]

I clearly got this wrong, BUT when you get the answer, please post in Parts Interchange on Techwiki

[fj20spl311]

38120-61000: BEARING-DRIVE PINION, REAR TIMKEN 32307 ; 1.378 Cone Bore; 1.2205 Cone Width; 3.1496 Cup Outer Diam; 0.9843 Cup Width Info
Category: Differential Pinion Bearing

38140-61000: BEARING-DRIVE PINION, FRONT TIMKEN 30306M ; 1.1811 Cone Bore; 0.748 Cone Width; 2.8346 Cup Outer Diam; 0.6299 Cup Width Info
Category: Differential Pinion Bearing

They are also listed in the catalog for a 69 2000

[notoptoy]

38120-61000: BEARING-DRIVE PINION, REAR TIMKEN 32307 ; 1.378 Cone Bore; 1.2205 Cone Width; 3.1496 Cup Outer Diam; 0.9843 Cup Width Info
Category: Differential Pinion Bearing

38140-61000: BEARING-DRIVE PINION, FRONT TIMKEN 30306M ; 1.1811 Cone Bore; 0.748 Cone Width; 2.8346 Cup Outer Diam; 0.6299 Cup Width Info
Category: Differential Pinion Bearing

They are also listed in the catalog for a 69 2000

Updated in Tech wiki - 311s parts - bearings.

[Curtis]

The bearings I removed from my rear end.
Small one: NSK 30306CN
Large one: NSK 32307CN

[Curtis]

The NSK bearings are readily available on the web.

[ppeters914]

Front (small) and rear (large) pinion bearings covered, but not the side ones. Searching RockAuto with Nissan P/N 40210-85000 (thanks, Phil!), I found:

TIMKEN 30208M {Click Info Button for Alternate/OEM Part Numbers} Wheel Race; 1.5748 Cone Bore; 0.7087 Cone Width; 3.1496 Cup Outer Diam; 0.6299 Cup Width
Category: Differential Bearing

There's also BECK/ARNLEY 0513079 and SKF BR30208 listed there.

Due to these bearings creating a work stoppage, I just ordered them from one of our wonderful roadster vendors rather than deal with multiple sources. If there is a next time, I'll plan accordingly.

I'll ask the repair shop for the old bearings for comparison.